摘要：The nano-sized small-crystal and hierarchical SAPO-11 molecular sieves were successfully synthesized with L-Lysine as the crystal growth inhibitor, and their particle size reached 80 nm at the minimum, and the crystal size was 22.1 nm. With the synthesized SAPO-11 molecular sieve as support, the corresponding NiW supported catalyst was prepared for the hydroisomerization of n-hexadecane. The properties of small-crystal and hierarchical SAPO-11 molecular sieve and catalyst were analyzed by a series of physicochemical characterizations, and the formation mechanism of small-crystal and hierarchical SAPO-11 molecular sieve was proposed. The results showed that the reduction of crystal size greatly improved the BET specific surface area, mesopore volume of SAPO-11 molecular sieve. The decrease of crystal size increased the surface Si content of SAPO-11 molecular sieve, thus improving the surface acidity of SAPO-11 molecular sieve, and weakening the interaction between active metals and supports of the catalysts. In addition, the decrease of crystal size increased the dispersion and stacking number of the active phases, thus greatly improving the catalytic performance of the catalysts. Compared with the catalyst corresponding to the conventional SAPO-11 molecular sieve, the yield of i-hexadecane of the catalyst corresponding to small-crystal and hierarchical SAPO-11 molecular sieve increased by 45.34%.

关键字：Nano-sized; Small-crystal; Crystal growth inhibitor; Hierarchical SAPO-11; Hydroisomerization

ISSN号：1387-1811

卷、期、页：卷: 343

发表日期：2022-09-01

影响因子：5.454500

期刊分区（SCI为中科院分区）：二区

收录情况：SCIE（科学引文索引网络版）

发表期刊名称：MICROPOROUS AND MESOPOROUS MATERIALS

通讯作者：代校军,成艳,司梦,张鹏飞

第一作者：魏强,周亚松

论文类型：期刊论文

论文概要：代校军,成艳,魏强,司梦,张鹏飞,周亚松，Synthesis of nano-sized small-crystal and hierarchical SAPO-11 molecular sieves and superior catalytic performance of their NiWS-supported catalysts in hydroisomerization of n-hexadecane，MICROPOROUS AND MESOPOROUS MATERIALS，2022，卷: 343

论文题目：Synthesis of nano-sized small-crystal and hierarchical SAPO-11 molecular sieves and superior catalytic performance of their NiWS-supported catalysts in hydroisomerization of n-hexadecane